To solve the problem, we need to find the probability of the complement of event \( A \), denoted as \( P(\overline{A}) \), given that \( P(A) = \frac{4}{15} \).
1. Understanding the Complement Rule:
In probability, the sum of the probabilities of an event and its complement is always 1. That is:
\( P(A) + P(\overline{A}) = 1 \)
2. Substituting the Given Value:
Given \( P(A) = \frac{4}{15} \), we substitute into the equation:
\( \frac{4}{15} + P(\overline{A}) = 1 \)
3. Solving for \( P(\overline{A}) \):
\( P(\overline{A}) = 1 - \frac{4}{15} = \frac{15}{15} - \frac{4}{15} = \frac{11}{15} \)
Final Answer:
The value of \( P(\overline{A}) \) is \({\frac{11}{15}} \).
A shop selling electronic items sells smartphones of only three reputed companies A, B, and C because chances of their manufacturing a defective smartphone are only 5%, 4%, and 2% respectively. In his inventory, he has 25% smartphones from company A, 35% smartphones from company B, and 40% smartphones from company C.
A person buys a smartphone from this shop
A shop selling electronic items sells smartphones of only three reputed companies A, B, and C because chances of their manufacturing a defective smartphone are only 5%, 4%, and 2% respectively. In his inventory, he has 25% smartphones from company A, 35% smartphones from company B, and 40% smartphones from company C.
A person buys a smartphone from this shop
(i) Find the probability that it was defective.